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    <div class="refentry" id="glDrawArraysIndirect">
      <div class="titlepage"/>
      <div class="refnamediv">
        <h2>Name</h2>
        <p>glDrawArraysIndirect — render primitives from array data, taking parameters from memory</p>
      </div>
      <div class="refsynopsisdiv">
        <h2>C Specification</h2>
        <div class="funcsynopsis">
          <table style="border: 0; cellspacing: 0; cellpadding: 0;" class="funcprototype-table">
            <tr>
              <td>
                <code class="funcdef">void <strong class="fsfunc">glDrawArraysIndirect</strong>(</code>
              </td>
              <td>GLenum <var class="pdparam">mode</var>, </td>
            </tr>
            <tr>
              <td> </td>
              <td>const void *<var class="pdparam">indirect</var><code>)</code>;</td>
            </tr>
          </table>
          <div class="funcprototype-spacer"> </div>
        </div>
      </div>
      <div class="refsect1" id="parameters">
        <h2>Parameters</h2>
        <div class="variablelist">
          <dl class="variablelist">
            <dt>
              <span class="term">
                <em class="parameter">
                  <code>mode</code>
                </em>
              </span>
            </dt>
            <dd>
              <p>
                    Specifies what kind of primitives to render.
                    Symbolic constants
                    <code class="constant">GL_POINTS</code>,
                    <code class="constant">GL_LINE_STRIP</code>,
                    <code class="constant">GL_LINE_LOOP</code>,
                    <code class="constant">GL_LINES</code>,
                    <code class="constant">GL_LINE_STRIP_ADJACENCY</code>,
                    <code class="constant">GL_LINES_ADJACENCY</code>,
                    <code class="constant">GL_TRIANGLE_STRIP</code>,
                    <code class="constant">GL_TRIANGLE_FAN</code>,
                    <code class="constant">GL_TRIANGLES</code>,
                    <code class="constant">GL_TRIANGLE_STRIP_ADJACENCY</code>,
                    <code class="constant">GL_TRIANGLES_ADJACENCY</code> and 
                    <code class="constant">GL_PATCHES</code>
                    are accepted.
                </p>
            </dd>
            <dt>
              <span class="term">
                <em class="parameter">
                  <code>indirect</code>
                </em>
              </span>
            </dt>
            <dd>
              <p>
                    Specifies the address of a structure containing the draw parameters.
                </p>
            </dd>
          </dl>
        </div>
      </div>
      <div class="refsect1" id="description">
        <h2>Description</h2>
        <p>
            <code class="function">glDrawArraysIndirect</code> specifies multiple geometric primitives
            with very few subroutine calls. <code class="function">glDrawArraysIndirect</code> behaves
            similarly to <a class="citerefentry" href="glDrawArraysInstanced.xhtml"><span class="citerefentry"><span class="refentrytitle">glDrawArraysInstanced</span></span></a>,
            except that the parameters to <a class="citerefentry" href="glDrawArraysInstanced.xhtml"><span class="citerefentry"><span class="refentrytitle">glDrawArraysInstanced</span></span></a>
            are stored in memory at the address given by <em class="parameter"><code>indirect</code></em>.
        </p>
        <p>
            The parameters addressed by <em class="parameter"><code>indirect</code></em> are packed into a structure
            that takes the form (in C):
            </p>
        <pre class="programlisting">    typedef  struct {
        uint  count;
        uint  primCount;
        uint  first;
        uint  reserved;
    } DrawArraysIndirectCommand;

    const DrawArraysIndirectCommand  *cmd  = (const DrawArraysIndirectCommand  *)indirect;
    glDrawArraysInstanced(mode,  cmd-&gt;first,  cmd-&gt;count,  cmd-&gt;primCount);</pre>
        <p>
        </p>
        <p>
            If a buffer is bound to the <code class="constant">GL_DRAW_INDIRECT_BUFFER</code> binding at the time
            of a call to <code class="function">glDrawArraysIndirect</code>, <em class="parameter"><code>indirect</code></em>
            is interpreted as an offset, in basic machine units, into that buffer and the parameter
            data is read from the buffer rather than from client memory.
        </p>
        <p>
            In contrast to <a class="citerefentry" href="glDrawArraysInstanced.xhtml"><span class="citerefentry"><span class="refentrytitle">glDrawArraysInstanced</span></span></a>,
            the <code class="code">first</code> member of the parameter structure is unsigned, and out-of-range indices
            do not generate an error.
        </p>
        <p>
            Vertex attributes that are modified by <code class="function">glDrawArraysIndirect</code> have an
            unspecified value after <code class="function">glDrawArraysIndirect</code> returns. Attributes that aren't
            modified remain well defined.
        </p>
      </div>
      <div class="refsect1" id="notes">
        <h2>Notes</h2>
        <p>
            The <em class="parameter"><code>reserved</code></em> member of the <em class="parameter"><code>DrawArraysIndirectCommand</code></em>
            structure should be set to zero. Behavior is undefined if it is non-zero.
        </p>
        <p>
            <code class="constant">GL_LINE_STRIP_ADJACENCY</code>,
            <code class="constant">GL_LINES_ADJACENCY</code>,
            <code class="constant">GL_TRIANGLE_STRIP_ADJACENCY</code>,
            <code class="constant">GL_TRIANGLES_ADJACENCY</code> and
            <code class="constant">GL_PATCHES</code>
            are available only if the GL ES version is 3.2 or greater.
        </p>
      </div>
      <div class="refsect1" id="errors">
        <h2>Errors</h2>
        <p>
            <code class="constant">GL_INVALID_ENUM</code> is generated if <em class="parameter"><code>mode</code></em> is not an accepted value.
        </p>
        <p>
            <code class="constant">GL_INVALID_OPERATION</code> is generated if a non-zero buffer object name is bound to an
            enabled array or to the <code class="constant">GL_DRAW_INDIRECT_BUFFER</code> binding and the buffer object's data store is currently mapped.
        </p>
        <p>
            <code class="constant">GL_INVALID_OPERATION</code> is generated if a geometry shader is active and <em class="parameter"><code>mode</code></em>
            is incompatible with the input primitive type of the geometry shader in the currently installed program object.
        </p>
      </div>
      <div class="refsect1" id="versions">
        <h2>API Version Support</h2>
        <div class="informaltable">
          <table style="border-collapse: collapse; border-top: 2px solid ; border-bottom: 2px solid ; border-left: 2px solid ; border-right: 2px solid ; ">
            <colgroup>
              <col style="text-align: left; "/>
              <col style="text-align: center; " class="firstvers"/>
              <col style="text-align: center; "/>
              <col style="text-align: center; "/>
              <col style="text-align: center; " class="lastvers"/>
            </colgroup>
            <thead>
              <tr>
                <th style="text-align: left; border-right: 2px solid ; ">
                 
            </th>
                <th style="text-align: center; border-bottom: 2px solid ; " colspan="4">
                <span class="bold"><strong>OpenGL ES API Version</strong></span>
            </th>
              </tr>
              <tr>
                <th style="text-align: left; border-right: 2px solid ; border-bottom: 2px solid ; ">
                <span class="bold"><strong>Function Name</strong></span>
            </th>
                <th style="text-align: center; border-right: 2px solid ; border-bottom: 2px solid ; ">
                <span class="bold"><strong>2.0</strong></span>
            </th>
                <th style="text-align: center; border-right: 2px solid ; border-bottom: 2px solid ; ">
                <span class="bold"><strong>3.0</strong></span>
            </th>
                <th style="text-align: center; border-right: 2px solid ; border-bottom: 2px solid ; ">
                <span class="bold"><strong>3.1</strong></span>
            </th>
                <th style="text-align: center; border-bottom: 2px solid ; ">
                <span class="bold"><strong>3.2</strong></span>
            </th>
              </tr>
            </thead>
            <tbody>
              <tr>
                <td style="text-align: left; border-right: 2px solid ; ">
                  <code class="function">glDrawArraysIndirect</code>
                </td>
                <td style="text-align: center; border-right: 2px solid ; ">-</td>
                <td style="text-align: center; border-right: 2px solid ; ">-</td>
                <td style="text-align: center; border-right: 2px solid ; ">✔</td>
                <td style="text-align: center; ">✔</td>
              </tr>
            </tbody>
          </table>
        </div>
      </div>
      <div class="refsect1" id="seealso">
        <h2>See Also</h2>
        <p>
            <a class="citerefentry" href="glDrawArrays.xhtml"><span class="citerefentry"><span class="refentrytitle">glDrawArrays</span></span></a>,
            <a class="citerefentry" href="glDrawArraysInstanced.xhtml"><span class="citerefentry"><span class="refentrytitle">glDrawArraysInstanced</span></span></a>,
            <a class="citerefentry" href="glDrawElements.xhtml"><span class="citerefentry"><span class="refentrytitle">glDrawElements</span></span></a>,
            <a class="citerefentry" href="glDrawRangeElements.xhtml"><span class="citerefentry"><span class="refentrytitle">glDrawRangeElements</span></span></a>,
        </p>
      </div>
      <div class="refsect1" id="Copyright">
        <h2>Copyright</h2>
        <p>
            Copyright <span class="trademark"/>© 2010-2015 Khronos Group. 
            This material may be distributed subject to the terms and conditions set forth in 
            the Open Publication License, v 1.0, 8 June 1999.
            <a class="link" href="http://opencontent.org/openpub/" target="_top">http://opencontent.org/openpub/</a>.
        </p>
      </div>
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